Issue 21, 2024

Aggregation-induced enhanced fluorescence emission of chiral Zn(ii) complexes coordinated by Schiff-base type binaphthyl ligands

Abstract

A pair of novel chiral Zn(II) complexes coordinated by Schiff-base type ligands derived from BINOL (1,1′-bi-2-naphthol), R-/S-Zn, were synthesized. X-ray crystallography revealed the presence of two crystallographically independent complexes; one has a distorted trigonal–bipyramidal structure coordinated by two binaphthyl ligands and one disordered methanol molecule (molecule A), while the other has a distorted tetrahedral structure coordinated by two binaphthyl ligands (molecule B). Numerous CH⋯π and CH⋯O interactions were identified, contributing to the formation of a 3-dimensional rigid network structure. Both R-/S-Zn exhibited fluorescence in both CH2Cl2 solutions and powder samples, with the photoluminescence quantum yields (PLQYs) of powder samples being twice as large as those in solutions, indicating aggregation-induced enhanced emission (AIEE). The AIEE properties were attributed to the restraint of the molecular motion arising from the 3-dimensional intermolecular interactions. CD and CPL spectra were observed for R-/S-Zn in both solutions and powders. The dissymmetry factors, gabs and gCPL values, were within the order of 10−3 to 10−4 magnitudes, comparable to those reported for chiral Zn(II) complexes in previous studies.

Graphical abstract: Aggregation-induced enhanced fluorescence emission of chiral Zn(ii) complexes coordinated by Schiff-base type binaphthyl ligands

Supplementary files

Article information

Article type
Paper
Submitted
27 мар 2024
Accepted
23 апр 2024
First published
24 апр 2024

Dalton Trans., 2024,53, 8926-8933

Aggregation-induced enhanced fluorescence emission of chiral Zn(II) complexes coordinated by Schiff-base type binaphthyl ligands

D. Tauchi, K. Kanno, M. Hasegawa, Y. Mazaki, K. Tsubaki, K. Sugiura, T. Shiga, S. Mori and H. Nishikawa, Dalton Trans., 2024, 53, 8926 DOI: 10.1039/D4DT00903G

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements